Area-spline charts are similar to area charts; however, as the name suggests, they are based on spline charts. Since all the configuration options for area-spline charts are identical to that of area charts, we can easily interchange the two chart types.

Consider the code from the very first example in this chapter, where we visualized the net income of Microsoft and Apple, and change the chart's type parameter from area to areaspline:

chart: {
  type: 'areaspline'
}

This will change the chart to area-spline: